Yeah dude, Aff won’t be amazing with this. You’re literally already capped on PvP talents. You never take Amp, it’s always Rampant, Demon Armor/Nether Ward and RC. Your only choices are either Demon Armor or Nether Ward, that’s it, otherwise you lose out on a lot.
If they gave Aff 1 or 2 PvP talents baseline to free up more PvP talents, then yeah you can totally use Amp or something else but especially in an RBG setting, you’re 100% capped on GCDs so making us have to use more curses and not getting an auto slow with Corruption will just hurt the spec entirely since it gets hurt with GCDs. Healers are not afraid to dispel with Aff DoTs, even a Rot Cleave they will still dispel on CD with 0 worries.